Neue Ergebnisse zur Gletscher- und Klimageschichte des Spätmittelalters und der Neuzeit
This article contributes to the glacier and climatic fluctuations during the late Middle Ages and the Modern Times. With the aid of radiocarbon dating of fossil woods and a fossil soil (fAh) located in the gletschervorfeld of two glaciers (Glacier de Zinal and Riedgletscher, Valais), the foUowing gl...
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| Format: | Article |
| Language: | deu |
| Published: |
Copernicus Publications
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| Series: | Geographica Helvetica |
| Online Access: | http://www.geogr-helv.net/40/168/1985/gh-40-168-1985.pdf |
| Summary: | This article contributes to the glacier and climatic
fluctuations during the late Middle Ages and the
Modern Times. With the aid of radiocarbon dating of
fossil woods and a fossil soil (fAh) located in the
gletschervorfeld of two glaciers (Glacier de Zinal and
Riedgletscher, Valais), the foUowing glacier advances
could be shown: between 890 yBP and 1095 yBP, at
515 yBP, in the seventeenth and in the nineteenth
Century.<br>
The tree rings from a larch (Larix decidua Mill.) near
the glacier and the tree line (Riedgletscher, 2180 m
altitude) was analysed by the X-ray densitometry. The
maximum density of the annual rings reflects the
summer temperatures since the middle of the twelfth
Century. The fluctuations of the maximum density
shows a close interrelation with the fluctuations of the
Grosser Aletschgletscher (Valais). The local climatic
influence of the Riedgletscher during maximal extension
is visible in reduced tree-growth. During the
retreat phase, when the glacier melted back, the
regional climate dominates the tree-growth again. |
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| ISSN: | 0016-7312 2194-8798 |